Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Nitrate compounds (water dissociable; reportable only when in aqueous solution) at Delaware City Refinery have more than doubled since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Delaware City Refinery
Total reported releases 4.3M lb fell modestly year over year (-8%). Total releases concentrations have more than doubled since 2010.
4550 WRANGLE HILL RD, Delaware City, Delaware · 324110 · Petroleum · operated by Pbf Energy INC
Anomaly engine
Notable Signals
Total reported releases
Total reported releases at Delaware City Refinery have more than doubled since 2010 (through 2024).
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) at Delaware City Refinery have risen 73% since 2011 (through 2024).
Chemicals reported · most recent year
What This Facility Releases
Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Nitrate compounds (water dissociable; reportable only when in aqueous solution) concentrations have more than doubled since 2010.
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) concentrations are up 74% since 2011.
Hydrogen cyanide
Hydrogen cyanide concentrations have more than doubled since 2015.
Ammonia
Ammonia concentrations have more than doubled since 2011.
n-Hexane
n-Hexane concentrations are up 58% since 2010.
Hydrogen sulfide
Hydrogen sulfide concentrations have fallen 33% since 2012.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations have more than doubled since 2010.
Creosote
Creosote concentrations have more than halved since 2013.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (3 Census block groups, population-weighted demographics): a population of 3,109. Why we surface this →
25.7%
Low-income
30.5%
People of color
2.5%
Under age 5
16.8%
Over age 64
Source: Census ACS 2018-2022 block-group demographics, population-weighted across the 3-mile buffer around this facility (from USEPA-clone/EJAM-open blockgroupstats). Indicator-level percentile and EJ-disparity scores are surfaced on the county page and the state page — they describe wider regional exposure burdens, not effects attributable to a single facility.
Source. EPA Toxics Release Inventory · retrieved 2026-05-07. Reporting year 2024. TRI is a federal public-domain dataset under 17 USC §105.
What this is not. TRI quantifies releases reported by the facility under EPCRA §313 — not ambient air or water concentrations measured at receptors. We do not attribute individual health outcomes to specific facilities; that exceeds what the data can support.